Ingredients ¼ c. scallions, sliced 1 Tsp. sesame oil 2Tbs. light mayonnaise 1 c. cooked sushi white rice or short grain brown rice 3 ounce sliced medium Hass avocado (1/2 ) 1 Tsp. black sesame seeds Sriracha for serving ½ lb sushi-grade tuna (1/2-inch cubes) 2 Tbs. gluten-free tamari or reduced-sodium soy sauce ½ Tsp. …